[amsat-bb] Driver for M2 rotors

Does anyone know of a program, or a rotor driver for a tracking program, that works with the M2 RX2800PX rotor control boxes? They use a serial interface. It works something like this The computer sends "A<CR>" and the rotor control box sends back the current azimuth Computer sends "E<CR>" and rotor sends back current elevation Computer sends "A68.4<CR>" and the rotor goes to azimuth 68.4

etc.

Any ideas on a tracker that talks that language?

Jim